diff --git a/lib/utils.js b/lib/utils.js
index 515cffa..ebaa93b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -24,8 +24,6 @@ exports.instanceId = function () {
 /**
  * Validate miner address
  **/
-
-var addressBase58 = parseInt(cnUtil.address_decode(new Buffer(config.poolAddress)).toString());
 var addressBase58Prefix = config.poolServer.pubAddressPrefix ? parseInt(config.poolServer.pubAddressPrefix) : parseInt(cnUtil.address_decode(Buffer.from(config.poolServer.poolAddress)).toString());
 let integratedAddressBase58Prefix = config.poolServer.intAddressPrefix ? parseInt(config.poolServer.intAddressPrefix) : addressBase58Prefix + 1;
 let subAddressBase58Prefix = config.poolServer.subAddressPrefix ? parseInt(config.poolServer.subAddressPrefix) : "N/A";